Jack for automobiles and the like.



E. ADELL.

JAC'K FOR AUTOMOBILES AND THE LIKE.

APPLICATION FILED JULY 6. 1914.

Patented May 23, 1916.

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E. ADELL. J-ACK FOR AUTOMOBILES AND THE LIKE. APPLICATIONTILED JULY 6.1914.

" Patnted May 23,1916.

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v Fdwae/ZAM THE COLUMBIA ruNoaRAPH (10., WASHINGTON, D. c

EDWARD'ADELL, OF ORANGE, MASSACHUSETTS.

JACK FOR AUTOMOBILES AND THE LIKE.

Specification of Letters Patent.

Patented May 23, 1916.

Application filed July 6, 1914. Serial No. 849,067.

To all whom it may concern.

Be it known thatI, EDWARD ADELL, acitizen of the United States, residing at Orange, in the county of Franklin. and State of Massachusetts, have invented a new and useful Jack for Automobiles and the like, of which the following is a specification.

This invention relates to a jackparticu' larly designed for use in lifting and'lowering automobile axles but capable of general use.

The principal objects of the invention'are to provide a light and simple jack contain ing few parts, all located in a small space at oneside of the rack; to construct a jack for this purpose almost entirely of sheet metal, and to produce a reduced and simplified pawl motion therefor.

The invention also involves improvements in the details of construction of the various Figure 1 is a side elevation, with parts broken away and shown in section, showing the parts in position for raising the rack; Fig. 2 is a similar view showing the parts in position for lowering therack; Fig. 3 is a rear elevation of the casing; Fig. 4.- is a sectional View on the line 4--1 of Fig. 3; Fig. 5 is a rear elevation of the rack and connected parts; and Fig. 6 is a sectional view on the line 66 of Fig. 5.

The invention is shown as embodied in a construction having a main outer casing A and a base B for supporting the same. In this casing is a rack G having teeth 0 on one side thereof and provided with a rest D at the top for receiving the axle or other body to be lifted. The details of these parts will be described hereinafter.

For the purpose of operating the rack the following mechanism is provided: Pivoted on a stud 10 is a lever 11 which can beprovided with a wooden or other extension or handle for operating it. The lever extends through a slot in anenlargement formed on the front of the casing. At its inner end it is provided with a stud 12 to which is pivotally connected a pawl 13 for engaging the teeth 0 of the rack. This pawl is arranged to move substantially vertically as the lever is oscillated about the'stud 10. Almost directly above the stud 10 is a stud 14 mounted on the casing and pivoted thereon is a second pawl 15 also adapted-to engage the teeth '0". stud 14 extends at: one end througha slot in the front of the pawl 15 and engages the top wall of said slot so 'asnormallyto hold this pawl againstthe rack in the position shown for example in Fig. 1. end of this spring 16 engages the front of the pawl 13 and normallyv forces thattowardv A spring 16 wound around the The other this point and permits it free play in the I casing. This spring extends upwardly in the casing into a position to engage the rear. of the pawl 13. j 1

Pivotedon a stud 23 supported by the easing is a trip lever 24. When this lever is is turned down to the position shown in Fig. p

2 itpresses the spring back toward the pawl 13. In this position it. engages a trip 26 which is pivoted on a stud 27 carried by the pawl 13. This trip projects to therear of the pawl 13 where it, is engaged by the spring and it also has an end projectingto the front where it can engage the pawl '15 as shown in Fig. 2. I

The operation of this part of the device is as follows: With the parts in the position shown'in Fig. 1, the spring 20 as stated is loose and does not affect the pawls, consequently the spring 16 is free to force both pawls toward the rack. Now when the lower end of the operating lever moves down to the position shown in Fig. 1 the springlfi has forced the end of the pawl15 in between two of the teeth .0 thus holding the rack in that position during the descent of the pawl13. During this downward motion of this pawl the tooth with which it was in engagement forces it outtoward the front and it comes down .freely until it springs over the bottom of that tooth, which it isv free to do. This entire action is con- 1 trolled by thespring 16. Now uponthe upward motion of the lower end of the lever engaging and then when it reaches the bottom of it swing in by the force 'of the spring 16. It then holdsthat tooth while the pawl 13 descends as the lever is turned in the opposite direction. 'During this entire motion the spring 20 and the trip 26 work idly. Now in order to lower the rack the trip lever 24 is turneddown to the position shown in Fig. 2. The effect of this, assuming that the pawl 15 at thattime is in engagement with one of the teeth, is to force the ,spring20 back against the front of the trip 26. This holds this trip resiliently and forces the pawl 13. forward away from the rack. Then the rack is held up simply by the pawl 15. If then the inner end of the lever 11 is lowered, the pawl 13 will simply work down idly without dislodging or affecting the pawl 15. Upon the rise of the inner end of the lever the pawl 13 is forced up with the trip 26 in-opposition to the spring 20. When the pawl reaches nearly the top of its stroke the end of the trip'26, held out by the spring 20, will engage a surface 29 on the pawl 15 and force that pawl out of engagement'with the tooth of the rack. By this time the end of the pawl 13 hasmoved in far enough to engage the bottom of a tooth. This occurs at the top of each upward movement of the pawl 13. Now when the pawl is drawn down the endof the trip 26 moves downwardly and forwardly along the surface 29 and allows the upper pawl 15 to gradually approach the rack while the pawl 13 is moved down, but soon the pawl 13 is forced forward by the top: of the spring 20 so as to disengage it from the tooth of the rack which it has been supporting. 'Thenthe rack drops on the pawl15 which by that time has projected. intoits path and the parts are ready to perform this operation over again. In this way it will be seen that very simple pawl mechanism is required for performing these results and that it is so constructed that the pawls' work together and cooperate with each other, thus reducing the number of parts required and permitting their being mounted at the front of the rack. In this way the use of mechanism projecting at the sideof the casing'and rack is entirely avoided.

I will now describe the construction of the casing and rack. The casing A consists of a single piece of sheet metal bent up into form by dies and having a seam at whichthe edges come together, preferably located at the center of the front thereof, that is the side from which the handle lever 11 projects. .In order to, hold this together at the bottom the base B .is provided also consisting of a single piece of sheetmetalhavinga hole in it for receiving the shank of the casing proper.

. Thecasing is provided with two slits a fitting over the top of the base,thus holding these parts in position. The ends of the sides of the casing extend down through openings in the bottom E with which the base is provided and are headed over to solidly hold these parts together. These parts B and E are also made of sheet metal. At the top'the casing is held together by a sheet metal ferrule F. On the sides of the casing isprovided with two tongues a which are pressed inwardly to serve as guides for the rack C and it is also provided on the rear surface with a pressed-out rib a which serves to strengthen the construction at this point and also serves as a guide for an integral projection g on the bottom of the rack. This rack is also made of a piece of sheet metal and its teeth 0 are made by cutting slits through one flat surface thereof parallel with each other and bending them in to the form illustrated in Fig. 6. The main part of the rack O is formed of a piece of sheet metal bent to form the three sides of a four-sided figure. The other side is made of a piece G of sheet metal fitting in between the edges of the piece C. It is provided with'a pair of projecting flanges g which project into slots formed in the edges of the sides of the member C to hold it in position. The bottom of this member G is free from this point down to form a spring and has the projection 9 extending into the groove a? and preventing the rack being removed easily after it is once inserted. By exerting suflicient pressure it can be pulled out but it will not ordinarily become dislodged in practice.

For the purpose of strengthening the rack it is provided on the inside thereof with a metal piece H which is put in from the top and has three sides. This fits into the rack for a distance down and is provided with a shoulder h which engages the first tooth at the top and securely holds these parts in position. The rest D at the top is also made of a piece of sheet metal and is connected with the members C and G by their ends extending up through it and being rivetedoover at the top. The member G is provided with an integral offset 9 on which the bottom of the rest engages for holding it in position. a

With this construction it will be seen that the parts are easily made in dies of a material which is strong and durable and especially light in weight for its strength. The

only a preferred embodiment of my invention and shown it as applied only for one purpose, I am aware of the fact that many modifications can be made in the construction and arrangement of the parts and that it can be used for other purposes without departing from the scope of the invention as expressed in the claims. Therefore I do not wish to be limited to all the details of construction shown, or the particular use mentioned, but

hat I do claim is 1. In a jack, the combination with a casing, a rack movable up and down in the casing, and a handle lever for operating the rack, of an operating pawl pivoted to the end of said operating lever, a second pawl pivoted at a stationary point, a single spring coiled around the pivot of the second pawl, each end forcing one of said pawls toward the rack, and a stronger spring for pushing the operating pawl from the rack as it descends and allowing the first named spring to move it against the rack as it ascends.

2. In ajack, the combination with a casing, a rack and an operating lever, of a pawl pivoted to said operating lever, a second pawl pivoted beyond the operating lever, yielding means for forcing both pawls toward the rack, a trip pivoted on the first pawl, a flat spring arranged parallel with the first pawl for normally engaging one.

end of said trip and holding the first pawl back away from the rack in opposition to said yielding means, a second pawl having a surface for engaging the other end of said trip on the other side of its pivot when the second pawl is held in engagement with a' scribing witnesses.

EDWARD ADELL. \Vitnesses CARL C. H RRIs, HARRY E. ANDERSON.

Copies of this patent may be obtained for five cents' each, by addressing the Commissioner of Patents, Washington. D. G. 

